Thank you for your query.
In viral fever
the temperature does fluctuate and may take a couple of days to come down to normal. However, unbearable headache and avoidance of light should not be taken lightly. The child should be examined to rule out signs of meningeal irritation
which the ER team must have done.
Apart from giving paracetamol/acetaminophen
at regular intervals kindly sponge the whole body with tepid water to bring the temperature down.
I hope I have responded to your query to your satisfaction.
Wishing your daughter an early recovery.